tidemann



5 Sheets-Sheet 1.

(No Model.)

H. G. TIDBMAN N.

V LINK BENDING MAGHINE.

Patented June 1883.

Ever) $01 Alf $4986.

Mm? WW N. PETERS, PMb-Ulhcgupller. Washington D. c.

5 Sheets-Sheet 3.

(No Model.)

H. G. TIDEMANN. LINK BENDING MACHINE.

Patented June 26,1883.

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(No Model.) 5 Sheets-Sheet 4.

H. G. TIDEMANN. LINK BENDING MACHINE.

No. 280,097. Patented June 26. 1883.

F1912 I?! g. 1.5.

A 498i fn-v-ento N, Pzrzns. Phmo-Mhographu. Washington 0,0.

(No Model.) 5 Sheets-Sheet 5.

H.-G. TIDEMANN.

LINK BBNDING MACHINE.

Patented Ju1ie 26, 1883;

UNIT-ED. STATES PATENT Orrica.

HENRY Gr. TIDEMANN, OF ST. LOUIS,'MISSOURI, ASSIGNOR OF QNFJ'IALF TO THEHELillIBAOl-IER FORGE AND ROLLING- MI'LLS (IOUPANXQ ()F SAME PLACE.

LlNK-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 280,097, dated June 26,1883.

Application filed January 15,1883. (No model.) V

To all whom, it may concern: A, Figs. 1, (i, 7,8,12, representtheimproved 50 Be it known that I, HENRY G. TIDEMANN, machine. The barfrom which the links are of St. Louis, Missouri, have made a new andmade is fed into the machine at the point (1,. t u useful Improvement inLink-Bending Ma passing horizontally between the stationary chines, ofwhich. the following is a full, clear, shear 13, Figs. 1., 6,14,15, 16,and the movable and exact description, reference being had to shear Binto the machine, as indicated by the 5 the annexed drawings, makingpart of this brokenlinesin Fig. 115, until inner endencountspecification, in whichers thefartherdie( The shears thenseverth'e Figure lis a front elevation of the improved bar, cutting offa length, 1.), Fig. 23, sufficient machine. Figs. 2 to 5, details uponan ento form the link. The shear.., 2 seenin Figs.

' larged scale, Figs. 2, 3 being respectively a 1.4, 15, 1.6, are setobliquely for the purpose ot' 60 side and top view of the centralportion of the be velingthe ends d (I o'l'the piece I). The piece, yokeused in connecting a pair of the formerafter being cut ot't', issupported by reason of its bars; Fig. 4, a section taken on the line 4.of ends (Z (I resting in the ofl'scts c c of the dies I 5 Fig. 3, andFig. 5 a section taken on the line C 0. "he formers 10 F then descendand force 5 5 of Fig. 3; Fig. 6, a side elevation of the the piece 1.)into the dies (1 0, respectively, 65 machine, aportionofthe housingbeing broken and in so doing cause the piece I l to be bent away; Fig.7, a plan; Fig. 8, a horizontal secinto the shape shown in Fig. 2.1, theends (I (1 tion taken on the line 8 8 of Fig. 1; Figs. 9, 10, beingupturned at a right angle, or thereahout, 2o 11, respectively, an endelevation, a side elevato the main portion (1 of the piece. The retion,and a top view of one of the levers used cesses (r' (2, respectively, inthe dies and formin effecting the horizontal outward movement ers (therecesses in the former and die 1 (l and ofthemandrels, Fig. 12, avertical central secthe recesses in the former E (1 being inclined tion,of the machine; Fig. 13, asection taken in opposite directions) areextended obliquely, '2 5 on the line 1313 of Fig. 12 Fig. 1.11, a detailas shown. in Figs. 18, 1.9, for the purpose of upon an enlarged scale,being a sectioil taken enabling the ends d d to lap when ultimately 7 onthe line 11 1.4, Fig. 1; Fig. 1.5, a front eleclosed together. Afterthis preliminarybend- 'ation of the parts shown in Fig. 11, the ing ofthe ends (1 d, the piece 1) rests in the former being down; Fig. 1b, asimilar elevarecesses c c of the dicsO C. The formers tion, the formerbeing raised and the parts as E F then rise and a movable mandrel, F,de-

when the link is being bent; Fig. 1'7, an elescends, encountering andbending the piece 1) 8o vation from the outer side of the shear; Fig. atits center, and forcing the piece between 18, an elevation from theinner side of the the rollers G l, and in so doing causing the shear;Fig. 19, an end view of the former, piece D to be bent into the linkform. shown Fig. 20, a bottom view of the former; Fig. 21, at D, Figs.25, 26. The mandrel F then an edgeview of the die, Fig. 22, a side view,retreats horizontally into the machine, caus- 85 showing a modificationof the die; Fig. 23, a ing the link D to drop from the mandrel. view ofthe bar from which the link is made; The mandrel is then carried upwardand into Fig. 24, a view of the bar after being shaped position todescend again and the operation by the formers; and Figs 25 and 26,respectis repeated. 111 thus shaping the bar at its ively, a plan and anelevation of the link as ends before bending it at the center, in place90 finished by the present machine. of first bending the bar at thecenter and after- The same letters denote the same parts. ward closingits ends, the forming of a link The p resent invention consists partlyin the such as a railway-car coupling-link-is greatly method of bendingthe linksand partlyin the facilitated. The metal during all the stepsmeans employed in carrying out the method. of the operation is underbetter control and 9 5 A prominent step in the improved method is moreeasily shaped, and the mechanism for the preliminary bending of the endsof the effecting the bending is simpler and more posi= bar beforebending the bar at the center. tive in its action.

The means preferably employed in operat- .ing the shears, formers, andmandrel will now be described.

The movable shear B attached to the rod 13 which in turn, at Z), ispivoted to a lever B. This lever moves upon the fulcrum I)", is weightedat I), the weight being adjustable upon the lever, and its inner end,If, extended to come beneath. the cam H, the movement of which depressesthe end If and causes the shears to operate. \Vhen the cam has passedthe end If, the weight 7) acts to lift the shear B sufticientlyto admitbeneath. it another bar.

The formers E E, theshape of which is shown more distinctly in Figs. l5,16, 19, 20, are attached, respectively, to the rods E E", which in turnare attached to the yoke E. The rods I) E" E work in suitable guides,

. such as I) c w. The yoke E, carrying the rods E E" and tormers E E,is, by means of the springs E" E and rods 'E E, elevated so as to liftthe formers E E sufficiently to admit beneath them the bar I). A cam, l,above the yoke E, acts in its rotation to depress the yoke. and forcethe lormers E E into the dies (1 t". The cams H II: preferably bear uponthe l'riction-rollers If with which the lever f3 and the yoke E a rerespectively provided. The cams l[ l, as well as the crank .l, used. inoperating the mandrel F, are u-eterably in one piece, and are attachedto the shaft K, Figs. 1, ti, '7, .12. The shat't turns in the bearings KE, and is provided with the gear K The pinion L upon the drivi ng-shattL engages with the gear K A. pitman, M, connects the crank l. and theilllfllSE-btll N, moving the bar upward and downward in the guides 11)1. The bar N, toward its lower end, is slotted to receive the mandrelF, the construction being such as to enable the bar, in. its downwardmovement, to bear upon the mandrel just in the rear of the :t'acing F ofthe mandrel and force the mandrel between the rollers (l- G, and in itsup ward movement to be sui'tieiently tree of the mandrel to enable thelatter to be withdrawn horizontally from the bar into the interior ofthe machine.

The mandrel F is provided with rollers E E and alter the mandrel haspassed down-- ward between the rollers GG inclined planes E' F", whichare attached to the i'ran'ie ot' the machine, act to move the mandrel,through the rollers F l", horizontally inward into'the interior of themachine, and sufliciently to cause the facing F of the mandrel to comebehind the plane of the shears, formers, and dies. This movement alsodischarges the link from oi't' the mandrel.

Crossbars O O are attached to, the thrustbar N and move with it. Theyserve as guides for the mandrel in its horizontal move The lower bar, 0,also serves, as the ment. bar N is drawn upward by the crank I, to liftthe mandrel. As the mandrel rises the rollers F F encounter the levers PI, Figs.

ti, 8, 9, 10, 11, 12, 13. The lovers are bellcrank in form, and arepivoted at p p to the crossbars Q Q. The mandrel andv bar 0, in rising,also strike the part 1) p of the levers l P. This causes the lcversitoturn on the pivots p p and force the part p 1) of the levers against therollers PF, and thereby thrust the mandrel horizontally outward throughthe thrust-barN again. The various parts are so arranged and constructedas to effect this outward movement of the mandrel alter it has beenelevated suiiiciently to be above the position of the bar 1). Theshears, i'ormcrs, and mandrel are then successively moved down wardagain, bending a second link, and so on.

Thus far but a single-acting machine has been described. I prelcrably,however, make it double-acting, and, as seen in Figs. (3, 7, S, 12, adouble set of shears, formers, dies, and mandrels, together with theparts necessaryto their operation, are used. The two bars X N are unitedby the crossbar 1i and the bars 0 0. Each bar N works between a pair ofthe housings (1? (15", the edges of which form or support the guides n)1.

I claim 1. In a link-bending machine, the dies E E, by which the linkends are bout, the yoke E, carrying said dies, and the mandrel F, bywhich the body of the link is bent, all combined with and operated bythe two-laced cam lrl. l, substantially as described.

2. The combination, in a linlebending machine, of the dies 0 (1, thei'ormers E E, the rods E E, theyoke E, roller 0 and the cam l, by whichthe movable parts are operattal,

substantially as described.

3. The combination of the shears l3 l3, the rod H, the lever B", theroller 7i, and the cam l-l, substantially as described.

4-. The combination, in a ]inkl, (mding ma chine, ot the shaft K, thecams ll 1', the crank I, the rod 13*, the lever B", the rods E E", the

yoke E, and the pitmanM, as and for the purpose described.

5. The combination, in a liuk-bending machine, of the yoke E", the rodsEE, the sprin E E, the rods E E, and the tormers E El, substantially asdescribed.

(3. In a link-bending machine, the combina tion of the dies 0 0, havingthe recesses c c, and the formers E E, having the recesses c c, saidrecesses c 0 being inclined, as and tor the purpose described.

7. In a link-bending machine, the combination of the 1nai1drel F, therollers F F the planes F" F, and the barO, substantially as described.

8. In a link-bending machine, the combina tion of the mandrel F, the bar0, the bar N, and the levers .l? .l. substantially as described.

HENRY (t. TTDEALXNN.

\Vi t1 iesses:

G. I). MOODY, 4 SAML. V. Bovi).

